Question

Give comparison between the following:
(a) C_3and C_4patheays
(b) Cyclic and non- cyclic photophosphrylation.
(c) Anatomy of leaf in C_3andC_4plants..​

Answer 1

Answer:

a) 1) in C3 pathway first stable product a 3 carbon containg compound PGA.

but in c4 first stable product is a 4 carbon containing compound OAA .

2) RUBP is the CO2 acceptor in c3

in c4 PEP is CO2 acceptor

3) in C3 pathway only RuBisCO is envolved

but in C4 pepcase in mesophyll and in bundle sheath cell RuBisCO present.

b) 1) Cyclic photophosphorylation involves only PS1 ,takes place in stroma lamellae , no NADPH2 is produced , no photolysis of water , 2 ATP produced

in non cyclic photophosphorylation both PS1 and PS2 are involved , take place in thylakoid membrane , one nadph2 is produced , photolysis of water take place , 1 ATP is produced.

c) c3 plant do not have kranz anatomy in their leaves

c4 have kranz anatomy

Explanation:

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